please dikerjakan soalnya bsk guru cek

1.
a.
panjang papan = r = 14m
sin a = y/r
sin45 = y/14
1/2 √2 = y/14
14 . 1/2 √2 = y
7√2 m = y

b.
cos a = x/r
cos45 = x/14
1/2 √2 = x/14
7√2 m = x

2.
menempuh jarak = r = 8 km
sin a = y/r
sin60 = y/8
1/2 √3 = y/8
8. 1/2 √3 = y
4√3 km = y